Disposable pressurized fluid dispenser

ABSTRACT

A self-contained disposable automatic dispenser for fluid products which has a simple spigot assembly comprised of a pair of cooperating portions which are arranged on opposite sides of the front wall of the dispenser and snapfitted together while sandwiching the front wall in a fluidtight manner therebetween. The dispenser is also provided with a pressure regulator assembly which has a bellows member which is also snapfitted in position on an associated support therefor and the support has integral safety means assuring the bellows member is prevented from being blown away from the regulator assembly in the event of a faulty regulator assembly.

United States Patent Inventor Calvin L. Wilson 2,898,208 8/ 1959 Land eta1 222/ 107X Chesterfield County, Va. 2,925,937 2/1960 Schmidt et al.222/399X Appl. No. 780,838 3,41 1,669 l l/l968 Puster 222/397X FiledDec. 3, 1968 3,294,289 12/1966 Bayne et al. 222/95 Patfmted 1971 PrimaryExaminer Stanley H. Tollberg Asslgnee Reynolds Metals CompanyAttorneyGlenn, Palmer, Lyne, Gibbs & Thompson Richmond, Va. acorporation of Delaware D UID DISPENSER DISPO-SABLE PRF'SSU-RIZE FLABSTRACT: A self-contained disposable automatic dispenser 12 Claims, 8Drawing Figs.

for fluid products which has a simple spigot assembly com- U.S. Cl222/396 prised ofa pair of cooperating portions which are arranged onB65d 83/00 opposite sides of the front wall of the dispenser andsnapfitted Field ofSearch 222/183 together hil d i hi h front wall in afluidtight (lnqlm'ed), 107; 22/95 397, 399; 229/45 manner therebetween.The dispenser is also provided with a 67 pressure regulator assemblywhich has a bellows member ed which is also snapfitted in position on anassociated support References therefor and the support has integralsafety means assuring the UNITED STATES PATENTS bellows member isprevented from being blown away from the 2,977 l/ 1956 Charpiat222/399X' regulator assembly in the event of a faulty regulatorassembly.

76 35 8| 2 26 70 x 82 so .PATNENTEHFEMBISYI m 2 OF 2 3563.423

' INVENTOR. CALVIN L. WILSON BY @clm m fwpdb w HIS ATTORNEYS 1DISPOSABLE PRESSURIZED FLUID DISPENSER BACKGROUND OF THE INVENTIONPresently many fluid products such as carbonated beverages, for example,are sold in comparatively expensive containers capable of withstandinggreat pressures and which must be cleaned and reused many times tooffset the initial cost of such containers. Each of these presentcontainers requires a complex spigot device for dispensing theassociated beverage carried therein and generally requires complex meansto keep the beverage charged with an associated charging fluid such ascarbon dioxide. In addition, many fluid products are presently sold inaerosol form and because of the high pressures involved such aerosolproducts must be sold in comparatively expensive dispensing devices.

SUMMARY This invention provides a safe automatic dispensing container ordispenser for fluids, such as carbonated beverages and aerosols of alltypes, which is capable of withstanding the pressures exerted by thesefluids yet such dispenser together with all of its associated componentsis self contained and very inexpensive enabling the dispenser to bediscarded after dispensing the fluid initially contained therein.

Other details, uses, and advantages of this invention will becomeapparent as the following description of the embodiment thereofpresented in the accompanying drawings proceeds.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3 is an enlarged fragmentarycross-sectional view of the lower right-hand corner portion of thedispenser as illustrated in FIG. 2;

FIG. 4 is a fragmentary cross-sectional view similar to the upperportion of FIG. 3 particularly illustrating a bellows member comprisingthe regulator assembly for the dispenser moved axially outwardly alongits yoltelike support from its normal operating position of FIG. 3 to anouter position on such support;

FIG. 5 is an exploded perspective view of the inner tubular body portionof the exemplary dispenser shown with its opposite end portions spacedaway therefrom and with the spigot or front end portion carryingassociated components preassembled in position thereon;

FIG. 6 is a greatly enlarged fragmentary cross-sectional view showingthe manner in which an end portion of the dispenser is mechanicallyfastened to an associated end of the tubular body of the dispenser;

FIG. 7 is a perspective view of a yokelike support which is adapted tobe fastened to the rear end portion of the dispenser and utilized tosupport a charging container and its associated pressure regulator valvemeans; and

FIG. 8 is a greatly enlarged view with parts in section and parts brokenaway particularly illustrating the spigot assembly fastened in positionto the front end portion of the dispenser.

DESCRIPTION OF ILLUSTRATED EMBODIMENTS In the exemplary embodiment ofthis invention illustrated in the drawings, a self-contained disposablefluid-dispensing container or dispenser is illustrated and designatedgenerally by the reference numeral 20. The dispenser 20 is of the typecommonly used to dispense carbonated beverages such as beer, softdrinks, or the like and comprises housing means 21 defined by amultilayer tubular portion or sidewall 22 and a pair of oppositelyarranged end walls which will be referred to as a front wall 23 and arear wall 24 for convenience, see FIGS. 1 and 2. The inside layer orchamber-defining wall of the sidewall 22 and the end walls 23 and 24 aresuitably fastened together in a fluidtight manner to define a fluidproduct chamber 25.

The dispenser 20 has a regulator assembly designated generally by thereference numeral 26 which is carried by the rear wall 24 of the housingmeans 21 and the regulator assembly operatively associates with a fluidsuch as a carbonated beverage carried within the product chamber 25 tomaintain a predetermined minimum pressure on the fluid within thechamber. For convenience and ease of presentation the fluid within thechamber 25 will be referred to throughout this specification as abeverage contained in such chamber.

The dispenser 20 also has a spigot assembly designated generally by thereference numeral 30 which is provided for dispensing the beverage fromthe chamber 25 in a known manner and the spigot assembly 30 has a siphontube 31 which has a terminal end portion 32 adapted to be submerged inthe beverage within the chamber 25 and in a known manner. The spigotassembly 30 for the exemplary dispenser 20 is fixed to the front wall 23of the housing means 21 and provides a fluidtight seal between theassociated assembly 30 and the front wall 23; yet, the fastening isachieved with optimum simplicity and economy.

The tubular portion 22 of the housing means 21 is comprised of thepreviously mentioned inside layer or fluid chamber wall and isdesignated by the reference numeral 35 and such wall is made of a fluidimpervious material such as metallic foil, for example. The inside layeror chamber wall 35 is sealed to the oppositely arranged end walls 23 and24 in a fluidtight manner and in a manner as will be described in detailsubsequently. The tubular portion 22 is also comprised of layer means 36adjoining the inside fluid chamber wall 35 and the layer means 36defines the main structural portion of the tubular portion 22. The layermeans or structural portion 36 may be made of any suitably inexpensivematerial such as paper, for example, and the structural portion 36 maycomprise one or more layers.

In one example of this invention the structural portion 36 was made byspirally winding and suitably adhesively bonding a paper web during thewinding operation to define the highstrength structural portion 36. Thestructural portion 36 assures that the comparatively thin tubularportion 35 is confined and prevented from moving outwardly once acarbonated beverage is introduced into the chamber 25 and charged with asuitable charging fluid such as carbon dioxide.

The tubular portion 22 may also be provided with an outer label 40 madeof a moisture-impervious material, such as metallic foil, and themetallic foil label 40 serves the multiple purposes of sealing andprotecting the outer surface of the structural portion 36 in amoistureproof manner, providing identification for the contents of thedispenser, and serving as a decorative surface for the dispenser 20. Thelabel 40 may be adhesively fastened in position and generally covers theentire exposed surface of the tubular portion 27..

Each wall23 and 24 of the exemplary dispenser 20 is shown as being madeof a metallic material and has a peripheral flange designated generallyin each instance by the reference numeral 42, see FIGS. 5 and 6. Eachflange 42 extends completely around its associated wall and has asubstantially U-shaped cross-sectional configuration defined by a bight43 and a pair of legs comprised of an inner leg 45 and an outer leg 46extending outwardly from opposite ends of the bight 43.

The outer leg 46 has a curled annular extension 50 extending outwardlytherefrom which is adapted to be curled around an associated end portion51 of the tubular layer or member 35 to thereby enable the end portion51 to be fixed between the inside surface of the terminal end portion ofthe curled extension 50 and the outer leg 46 to provide a fluidtightseal having high structural strength.

The fastening of each end 23 and 24 in position may be accomplished byany suitable technique and in this example of the invention thefastening action was achieved using a conventional can seamer. Thediameter of each end 23 and 24 was controlled by a swaging operationwherein the curled extension 50 was mechanically compressed by suitableswaging die means moving the outside surface 52 of the extension 50 sothat it is arranged substantially within the confines of the maximumdiameter of the metallic tubular portion 35. The joint defined by theabove-described mechanical swaging will be referred to as a multiplethickness seamed joint 53 and has a roughly frustoconical outerconfiguration.

Once the front wall 23 and rear wall 24 are seamed and swaged inposition against the inner tubular portion 35 the container assemblythus defined, and designated generally by the reference numeral 54 inFIG. 5, may be easily inserted within the structural portion 36 andsuitably held in position to prevent axial movement thereof. A suitableadhesive means, or the like, may be provided between the outside surfaceof the metallic tubular member 35 and the inside surface of thestructural portion 36 to hold the assembly 54 in position and preventaxial movement thereof relative to the structural portion 36. However,the assembly 54 may be inserted in position without the provision of anadhesive means between the tubular member 35 and the structural portion36 and suitably held against axial movement.

The exemplary dispenser has comparatively short tubular sections orcollars 55 fixed thereto and defining ends of the tubular portion 22 andthe collars 55 may be used as the sole means for holding each assembly54 axially in position or may be used together with adhesive meansbetween the inner tubular member 35 and the structural portion 36 tohold such as sembly axially in position, In addition, each collar 55provides added strength for the opposite ends of the dispenser 20assuring that the dispenser will withstand rough handling and may besupported vertically without likelihood of damage to its end portions.

As seen particularly in FIG. 3 each collar 55 has an outer surface 57adjoining the inside surface of the structural portion 36 and the collar55 also has an inwardly offset portion 60 which, with the collar 55fixed in position, cooperates with an oppositely arranged inside annularsurface 61 of the structural portion 36 to define an annular groovewhich is designated generally by the reference numeral 63.

Each collar 55 is fastened in position so that its offset portion 60 isreceived within an associated U-shaped flange 42 and the associatedmechanically seamed and swaged joint 53 is received within an annulargroove 63. With this structural arrangement it will be appreciated thatthe seamed joint 53 is effectively prevented from being pulled apart byhigh pressures in the product chamber 25. Each collar 55 may be fixed toan associated end portion of the structural portion 36 in any suitablemanner such as by adhesive means, rivets, staples, or the like, and inthis example of the invention each collar 55 is shown as being fastenedin position by a plurality of staples 65.

The collar 55 may be made of any suitable material and provided withoffset portion 60 as an integral part thereof. The collar 55 ispreferably made of expendable low-cost materials and it has been foundthat such collar having adequate strength may be made of paper suitablywound as by spiral winding, or the like; also, such collar may be madeof materials such as polystyrene. In this example of the invention thecollar 55 is shown as being made of paper and has a layer of metallicfoil 66 bonded to its inside cylindrical surface to render the insidesurface of such collar substantially impervious to moisture.

The front wall 23 has an opening 70 provided therein and defined by atubular flange portion 71 which in this example is formed as an integralpart of the front wall 23. The spigot assembly 30 may comprise first orcomparatively small diameter portion 72 which is arranged to extendoutwardly of the front wall 23 and will be referred to as outsideportion 72. The outside portion 72 has a fluid-dispensing outlet 73 anda normally closed manually operated spigot valve of known constructionprovided as a part thereof. The spigot valve has a pushbutton actuator75 which maybe pushed inwardly toward the center of the dispenser 20 toopen up the spigot valve and allow flow through the spigot assembly 30and out of the dispensing outlet 73 in a known manner.

The pushbutton 75 may be held normally outwardly by a mechanical springto keep the spigot valve closed at all times except when it is desiredto dispense beverage therethrough by depressing the button 75 andoverriding such spring.

The spigot assembly has a second comparatively larger diameter insideportion 76 which is fastened to the portion 72 so as to sandwich thetubular flange 71 therebetween and provide a fluidtight seal between thespigot assembly 30 and the front wall 23. The portions 72 and 76 of thespigot assembly 30 may be fastened together in any known suitablemanner.

To assure that the dispenser 20 of this invention may be made in themost economical manner the portions 72 and 76 are snapfitted togetherwhile sandwiching the tubular flange 71 therebetween in a fluidtightmanner, see FIG. 8. The snap.- fit connection is provided by an annularprojection 77 having an inwardly hooking inner portion 78 extendingcompletely around the projection 77 and the projection 77 with itshooking portion 78 are received and held in a locked manner within anannular recess 79 in the inside portion 76 which has a correspondingconfiguration. Thus, it will be appreciated that the inside portion 76and outside portion 72 are snapped together in a simple manner by urgingsuch members toward each other while clamping the tubular flange 71therebetween to provide an economical assembly and a fluidtight sealbetween the spigot assembly 30 and the front wall 23.

The siphon tube-31 comprising the spigot assembly 30 may be provided asa separate part and fixed'to the inside portion 76 in any suitablemanner; however, in this example of the invention the siphon tube 31 isprovided as an integral part of the inside portion 76. The flow passagemeans provided in the inside portion 76 and its siphon tube 31 areconstructed to as- I sure efficient dispensing of carbonated beveragewith minimum foaming.

Reference is now made to FIGS. 3, 4 and 7 of the drawings for a detaileddescription of the unique and inexpensive regulator assembly 26comprising the dispenser 20 and the simple and economical manner inwhich such regulator assembly 26 of the exemplary dispenser 20 issupported on the rear wall 24. The regulator assembly 26 comprises acharging container or tube 80 and a pressure regulator 81 which isoperatively connected to the charging container 80 and to the chamber 25to maintain a predetermined minimum pressure against the carbonatedbeverage contained within the chamber 25 irrespective of the fluid levelof such beverage within such chamber and in a known manner whereby thebeverage may be automatically dispensed from the spigot assembly 30 inan automatic manner simply by pressing the button 75.

The charging container 80 contains a suitable charging gas, such ascarbon dioxide, for example, which is contained in the container 80 athigh pressure. The charging container 80 is comprised of a tubularportion 82 and a pair of oppositely arranged end plugs 83 and 84 whichare suitably fixed in position to define a vessel capable ofwithstanding high internal pressures and the fixing technique utilizedis such that the container 80 may be formed in the most economicalmanner.

The pressure regulator 81 is comprised of a yokelike support 85, seeFIGS. 3, 4, and 7, and the support 85 has an integral resilient flange86 defining the outer periphery thereof and such flange has an innergroove 90 and an outer groove 91 extending inwardly from its insidesurface means 88. A bellows member or bellows 92 is provided andcarriedin nested relation by the flange 86 and the bellows member 92 has anannular portion 93 held by the flange 86 so that an inner edge 94 ofannular portion 93 is held in a fluidtight manner against an associatedperipheral annular portion 95 of an inner surface 96 of the yokelikesupport 85 to define a bellows chamber 100 between the support 85 andthe bellows member 92.

A metering valve 101 is provided and suitably inserted through anopening 102 in the plug 84 and sealed in a fluidtight manner and suchmetering valve may be of known construction and of the type generallyreferred to as a Schradertype valve. The metering valve 101 has atelescoping stem 103 which extends within the bellows chamber 100 and isadapted to be engaged by a projection 104 provided on the bellows member92 and the bellows member 92 may be filled with a suitable fluid ofknown characteristics at a predetermined temperature and pressure.

The yokelike support 85 has a passage 106 extending therethrough whichplaces the bellows chamber in flow communication with the beveragechamber 25. A one-way check valve 107 may also be provided at one end ofthe passage 106 to prevent the flow of beverage into the bellows chamber100.

With the above construction it will be appreciated that once thepressure in the chamber 100 is reduced by the removal of beverage fromwithin the beverage chamber 25 the projection 104 of the bellows member92 is caused to move inwardly, causing carbon dioxide from within thecharging container 80 to move into the bellows chamber 100, through theopening or passage 106, and through the check valve 107 into the chamber25 until the pressure within chamber 25 reaches a predetermined andaccurately controlled level whereupon the pressure in the bellowschamber 100is essentially at the same level as in the chamber 25,causing the projection 104 to again move away from the stem 103 and stopthe flow of .carbon dioxide. With this technique a substantiallyconstant pressure is maintained on the carbonated beverage within thechamber 25 irrespective of the beverage level within such chamber.

As previously indicated, the flange 86 of the yokelike support 85 has anouter groove 91 provided therein and the outer groove 91 serves a dualpurpose of receiving the annular portion 93 of the bellows member 82 tosupport such bellows member prior to finally installing the member 82 inposition to activate the regulator assembly 26 as well as serving toreceive annular portion 93 and prevent the bellows member 92 from beingblown off in the event of a malfunction as will now be explained.

In particular, it will be appreciated that the metering valve 101normally meters charging fluid into the bellows chamber 100 from thehigh pressure container 80. However, there may be an excessive pressurebuildup in the bellows chamber 100 because the valve 101 may leak orsuch valve may be improperly sealed to its plug 84. The normal tendencyunder these circumstances would be for the bellows member to be blownaway from the support 85; however, in the event of such excessivepressure buildup in the bellows chamber 100 bellows member 92 is movedoutwardly causing its annular portion 93 to be received in the outergroove 91 and causing an edge portion of the projection 93 to engage anannular surface portion 109 defining the outer groove 91 whereby themember 92 is, in effect, caught or trapped in position.

As the member 92 is blown outwardly and caught by surface portion orprojection 109 of the flange 86, the inner edge 94 of annular portion 93is simultaneously moved away from the support 85 venting the bellowschamber 100 to atmosphere in a safe manner and thus instantaneouslyrelieving the excessive pressure buildup within the bellows chamber 100.It will be appreciated that the installation presented is of optimumsimplicity in that the bellows member 92 is snapfitted in position andthus is fastened with minimum installation time while providing a uniquehigh-strength and safe support which eliminates the likelihood of injuryor damage to persons or structures located adjacent the rear wall 24 ofthe dispenser 20.

The yokelike support 85 may be fixed to the rear end portion 24 in anysuitable manner; however, in this exemplary embodiment of the invention,the support 85 is threadedly fastened to the rear wall 24 as will now beexplained.

The rear wall 24 has an outwardly extending tubular flange portion 108provided with a rolled external thread 110. The yokelike support 85 hascooperating female threads 112 provided in its flange 86 and the threads112 are threaded in position over the threads 110 to fasten the support85 in position so that the charging container extends inwardly withinthe dispenser 20 in a cantilevered manner and the bellows member 92 isfastened in position against the exterior surface of the support and hasparts of its outer surfaces exposed to ambient temperatures andpressures.

The support 85 may be formed of a suitable material so that its flange86 will have a resilient character to enable to bellows member 92 to be.snapfitted in position as previously described, while supporting suchbellows member in a highstrength manner. The resilient character of theflange 86 is also such that the trapping or catching of member 92 isefficiently provided, as previously described, in the event of excessivepressure buildup in the bellows chamber 100. The yokelike support 85 ispreferably made of a comparatively inexpensive material and it has beenfound that such member may be made of plastic material such as ahigh-density polyethylene by injection molding so that the femalethreads 1 12 are provided as an integral part thereof yet the support 85has the desired strength and resilient character.

To assure that the dispenser 20 will retain its high strength even indamp environments, the exposed annular edges 115 at opposite ends oftubular portion 22 are sealed in a moistureproof manner. In particular,it has been found that a moisture-impervious adhesive or a lacquercontaining aluminum powder may be effectively applied to the edges 115so as to seal the exposed edges of the collars 55 and structural member36.

The tubular inner layer or member 35 of the dispenser 20, front wall 23,and rear wall 24 may be made of any suitable material which isacceptable for containing a fluid under pressure in the manner describedherein. Further, the materials selected for the housing means 21 shouldbe capable of withstanding the high pressures normally involved instoring, transporting, and dispensing a carbonated beverage such as beeror a carbonated soft drink.

The housing means 21 comprising the dispenser 20 should also be made inan economical manner using expendable or disposable materials. Forexample, in one application of this invention wherein a G la-quartcapacity disposable self-contained beer keg was provided the tubularinside portion or wall 35 was made of 5086-1136 aluminum .006 inchthick, the front wall 23 and rear wall 24 were made of 5086-1-136reannealed to approximately H14 temper before drawing and .015 inchthick and the walls 23 and 24 were contoured in the manner shown in thedrawings, the structural support 36 was comprised of a spirally woundpaperboard construction hav ing a .096 inch wall thickness, and thecollars 55 were made of spiral wound paperboard and had a wall thicknessof .217 inch. The completed dispenser 20 made essentially as describedabove is generally capable of dispensing highly carbonated beverages andat pressures within the chamber 25 in excess of psig The simplicity withwhich the dispenser 20 is assembled will be readily apparent from thedrawings and it will be seen that the inner tubular member 35 has thefront walls 23 with its spigot assembly 30 preassembled thereon and therear wall 24 fastened in position thereto to define an assembly 54. Theassembly 54 is then inserted in the structural member 36 and the collars55 are installed in position. The regulator assembly 26 is shipped as aseparate unit and may be filled with carbon dioxide gas prior toshipment. Once the dispenser 20 has been filled with a carbonatedbeverage the regulator assembly 26 is installed therein and suitablyactivated whereupon the filled and self-contained dispenser 20 is readyfor dispensing use.

in an alternate embodiment of the dispenser, the regulator assembly isdisposed entirely within the container but is not attached thereto, sothat the regulator assembly is adapted to be immersed in the liquid tobe dispensed and is free to move within the container. The regulatorassembly is provided initially with a spacer acting between the yokelikesupport and its associated bellows operating end or bellows member. Thisspacer is made of a substance which is soluble or softenable in theliquid. When the dispenser is charged, the regulator is submerged in theliquid and the container promptly sealed. Once the spacer has dissolvedor softened, the bellows and valve will function in a similar manner aspreviously discussed.

While present exemplary embodiments of this invention, and methods ofpracticing the same, have been illustrated and described, it will berecognized that this invention may be otherwise variously embodied andpracticed within the scope of the following claims.

lclaim:

l. A self-contained disposable dispenser for dispensing a fluid underpressure comprising, housing means defining a product chamber for saidfluid, said housing means comprising a multilayer cylindrical portionhaving an inside layer which is contacted by said fluid and is made of acomparatively thin fluid-impervious material having a cylindricaloutside surface and layer means adjoining said outside surface oversubstantially its entire area, said layer means defining the mainstructural portion of said cylindrical portion and said structuralportion assuring said inside layer is prevented from moving outwardly bysaid fluid under pressure, a regulator assembly carried by said housingmeans and operatively associating with the fluid carried within saidchamber to maintain pressure on said fluid, and a spigot assemblycarried by said housing means and provided for dispensing said fluidfrom within said chamber.

2. A dispenser as set forth in claim 1 in which said inside layercomprises a layer of metallic foil fixed against said structural portionand said structural portion is comprised of a nonmetallic material.

3. A self-contained disposable fluid dispenser comprising: housing meansdefining a fluid product chamber; said housing means comprising amultilayer tubular portion having an inside layer made of afluid-impervious material and layer means adjoining said inside layerdefining the main structural portion of said tubular portion; saidhousing means further comprising an end wall having a peripheral flangeof substantially U- shaped cross-sectional configuration extendingcompletely therearound, said U-shaped flange having a bight and a pairof outwardly extending legs including an outer leg which terminates inan annular curled extension, and said inside layer having an end portionwhich is fixed between said extension and said outer leg to define amultiple thickness mechanical joint having high strength; a regulatorassembly carried by said housing means and operatively associating witha fluid carried within said product chamber to maintain pressure on saidfluid; and a spigot assembly for dispensing said fluid from within saidchamber.

4. A dispenser as set forth in claim 3 in which said tubular portion hasa comparatively short tubular section fixed thereto adjacent said oneend wall, said tubular section having an inwardly offset portion whichcooperates with an oppositely arranged inside annular surface of saidstructural portion to define an annular groove, said annular groovereceiving said mechanical joint therewithin while said projection isreceived within said Ushaped flange to provide a construction whichassures said end wall will be held firmly in position even withexcessive pressures within said chamber.

5. A dispenser as set forth in claim 3 in which the outside surface ofsaid mechanical joint has an inwardly inclined configuration and anouter peripheral outline which corresponds to and is no greater than theperipheral outline of the inside surface of said structural portion.

6. A self-contained disposable fluid dispenser comprising, housing meansdefining a fluid product chamber, said housing means comprising amultilayer tubular portion having an inside layer made of afluid-impervious material and layer means adjoining said inside layerdefining the main structural portion of said tubular portion, aregulator assembly carried by said housing means and operativelyassociating with a fluid carried within said chamber, said housing meanscomprising an end wall having an opening therein defined by a tubularflange and said spigot assembly having a first and a second portionarranged essentially on opposite sides of and sandwiching said tubularflange therebetween to provide a fluidtight seal between said end walland said spigot assembly, said first and second portions beingsnapfitted together.

7. A dispenser as set forth in claim 1 in which said cylindrical portioncomprises a right circular cylindrical portion and said housing meansfurther comprises a pair of end walls fixed to opposite end portions ofsaid right circular cylindrical portion in sealed relation with onlysaid inside layer, each of said end walls being made of a metallicmaterial and having a substantially uniform thickness throughout, saidregulator assembly being carried by one of said end walls and comprisinga charging container containing a pressurized charging fluid and apressure regulator operatively associating with said charging containerand said chamber to maintain a. predetermined minimum pressure againstthe fluid within said chamber irrespective of the fluid levelwithin-said chamber, said spigot assembly being carried by the other ofsaid end walls.

8. A dispenser as set forth in claim 7 in which said pressure regulatorhas a bellows member which has parts of its outer surfaces exposed toambient pressures and temperatures.

9. A self-contained disposable dispenser for dispensing a fluid underpressure comprising, housing means defining a product chamber for saidfluid, said housing means comprising a multilayer tubular portion havingan inside layer made of a comparatively thin fluid-impervious materialand layer means adjoining the entire outside surface of said insidelayer, said layer means defining the main structural portion of saidtubular portion and said structural portion assuring said inside layeris prevented from moving outwardly by said fluid under pressure, aregulator assembly carried by said housing means and operativelyassociating with the fluid carried within said chamber to maintainpressure on said fluid, and a spigot assembly carried by said housingmeans and provided for dispensing said fluid from within said chamber,said tubular portion comprising a right circular cylindrical portion andsaid housing means further comprising a pair of end walls fixed toopposite end portion of said right circular cylindrical portion insealed relation with said inside layer, each of said end walls having asubstantially uniform thickness throughout, said regulator assemblybeing carried by one of said end walls and comprising a chargingcontainer containing a pressurized charging fluid and a pressureregulator operatively associating with said charging container and saidchamber to maintain a predetermined minimum pressure against the fluidwithin said chamber irrespective of the fluid level within said chamber,said pressure regulator being carried within said product chamber andhaving a bellows member which is exposed solely to pressures andtemperatures in said product chamber, said spigot assembly being carriedby the other of said end walls.

10. A self-contained disposable fluid dispenser comprising; housingmeans defining a fluid product chamber; said housing means comprising amultilayer tubular portion having an inside layer made of afluid-impervious material and layer meansv adjoining said inside layerdefining the main structural portion of said tubular portion; aregulator assembly carried by said housing means and operativelyassociating with a fluid carried within said product chamber to maintainpressure on said fluid; and a spigot assembly for dispensing said fluidfrom within said chamber; said regulator assembly comprising, a yokelikesupport fastened to said housing means, said support having a resilientannular flange defining the outer periphery thereof with said flangehaving an inner groove and an outer groove formed therein, a bellowsmember having an annular portion thereof snapfitted within said innergroove, said annular portion having an inner edge which is held in afluidtight manner against said support to define a bellows chamberbetween said support and said bellows member, a charging containercontaining a pressurized charging fluid and carried by said support, ametering valve operatively connected port to vent said bellows chamberto atmosphere in a safe manner and relieve the excessive pressurebuildup.

11. A dispenser as set forth in claim 7 in which said inside layer isdefined as a layer of aluminum foil, said layer means defining saidstructural portion is made of paper, and further outer groove and caughtby surface means defining said outer l0 groove to prevent furtheroutward movement thereof while simultaneously said inner edge is movedaway from said supcomprising adhesive means between said inside layerand said layer means holding said inside layer firmly in position.

12. A dispenser as set forth in claim 7 in which said charging containeris defined by a cylindrical tube having a pair of oppositely arrangedend plugs.

1. A self-contained disposable dispenser for dispensing a fluid under pressure comprising, housing means defining a product chamber for said fluid, said housing means comprising a multilayer cylindrical portion having an inside layer which is contacted by said fluid and is made of a comparatively thin fluid-impervious material having a cylindrical outside surface and layer means adjoining said outside surface over substantially its entire area, said layer means defining the main structural portion of said cylindrical portion and said structural portion assuring said inside layer is prevented from moving outwardly by said fluid under pressure, a regulator assembly carried by said housing means and operatively associating with the fluid carried within said chamber to maintain pressure on said fluid, and a spigot assembly carried by said housing means and provided for dispensing said fluid from within said chamber.
 2. A dispenser as set forth in claim 1 in which said inside layer comprises a layer of metallic foil fixed against said structural portion and said structural portion is comprised of a nonmetallic material.
 3. A self-contained disposable fluid dispenser comprising: housing means defining a fluid product chamber; said housing means comprising a multilayer tubular portion having an inside layer made of a fluid-impervious material and layer means adjoining said inside layer defining the main structural portion of said tubular portion; said housing means further comprising an end wall having a peripheral flange of substantially U-shaped cross-sectional configuration extending completely therearound, said U-shaped flange having a bight and a pair of outwardly extending legs including an outer leg which terminates in an annular curled extension, and said inside layer having an end portion which is fixed between said extension and said outer leg to define a multiple thickness mechanical joint having high strength; a regulator assembly carried by said housing means and operatively associating with a fluid carried within said product chamber to maintain pressure on said fluid; and a spigot assembly for dispensing said fluid from within said chamber.
 4. A dispenser as set forth in claim 3 in which said tubular portion has a comparatively short tubular section fixed thereto adjacent said one end wall, said tubular section having an inwardly offset portion which cooperates with an oppositely arranged inside annular surface of said structural portion to define an annular groove, said annular groove receiving said mechanical joint therewithin while said projection is received within said U-shaped flange to provide a construction which assures said end wall will be held firmly in position even with excessive pressures within said chamber.
 5. A dispenser as set forth in claim 3 in which the outside surface of said mechanical joint has an inwardly inclined configuration and an outer peripheral outline which corresponds to and is no greater than the peripheral outline of the inside surface of said structural portion.
 6. A self-contained disposable fluid dispenser comprising, housing means defining a fluid product chamber, said housing means comprising a multilayer tubular portion having an inside layer made of a fluid-impervious material and layer means adjoining said inside layer defining the main structural portion of said tubular portion, a regulator assembly carried by said housing means and operatively associating with a fluid carried within said product chamber to maintain pressure on said fluid, and a spigot assembly for dispensing said fluid from within said chamber, said housing means comprising an end wall having an opening therein defined by a tubular flange and said spigot assembly having a first and a second portion arranged essentially on opposite sides of and sandwiching said tubular flange therebetween to provide a fluidtight seal between said end wall and said spigot assembly, said first and second portions being snapfitted together.
 7. A dispenser as set forth in claim 1 in which said cylindrical portion comprises a right circular cylindrical portion and said housing means further comprises a pair of end walls fixed to opposite end portions of said right circular cylindrical portion in sealed relation with only said inside layer, each of said end walls being made of a metallic material and having a substantially uniform thickness throughout, said regulator assembly being carried by one of said end walls and comprising a charging container containing a pressurized charging fluid and a pressure regulator operatively associating with said charging container and said chamber to maintain a predetermined minimum pressure against the fluid within said chamber irrespective of the fluid level within said chamber, said spigot assembly being carried by the other of said end walls.
 8. A dispenser as set forth in claim 7 in which said pressure regulator has a bellows member which has parts of its outer surfaces exposed to ambient pressures and temperatures.
 9. A self-contained disposable dispenser for dispensing a fluid under pressure comprising, housing means defining a product chamber for said fluid, said housing means comprising a multilayer tubular portion having an inside layer made of a comparatively thin fluid-imPervious material and layer means adjoining the entire outside surface of said inside layer, said layer means defining the main structural portion of said tubular portion and said structural portion assuring said inside layer is prevented from moving outwardly by said fluid under pressure, a regulator assembly carried by said housing means and operatively associating with the fluid carried within said chamber to maintain pressure on said fluid, and a spigot assembly carried by said housing means and provided for dispensing said fluid from within said chamber, said tubular portion comprising a right circular cylindrical portion and said housing means further comprising a pair of end walls fixed to opposite end portion of said right circular cylindrical portion in sealed relation with said inside layer, each of said end walls having a substantially uniform thickness throughout, said regulator assembly being carried by one of said end walls and comprising a charging container containing a pressurized charging fluid and a pressure regulator operatively associating with said charging container and said chamber to maintain a predetermined minimum pressure against the fluid within said chamber irrespective of the fluid level within said chamber, said pressure regulator being carried within said product chamber and having a bellows member which is exposed solely to pressures and temperatures in said product chamber, said spigot assembly being carried by the other of said end walls.
 10. A self-contained disposable fluid dispenser comprising; housing means defining a fluid product chamber; said housing means comprising a multilayer tubular portion having an inside layer made of a fluid-impervious material and layer means adjoining said inside layer defining the main structural portion of said tubular portion; a regulator assembly carried by said housing means and operatively associating with a fluid carried within said product chamber to maintain pressure on said fluid; and a spigot assembly for dispensing said fluid from within said chamber; said regulator assembly comprising, a yokelike support fastened to said housing means, said support having a resilient annular flange defining the outer periphery thereof with said flange having an inner groove and an outer groove formed therein, a bellows member having an annular portion thereof snapfitted within said inner groove, said annular portion having an inner edge which is held in a fluidtight manner against said support to define a bellows chamber between said support and said bellows member, a charging container containing a pressurized charging fluid and carried by said support, a metering valve operatively connected between said bellows member and said charging container, said metering valve being actuated by said bellows member to meter said charging fluid into said bellows chamber, and a passage from said bellows chamber to said product chamber, said metering valve normally metering charging fluid into said bellows chamber and hence into said product chamber through said passage and in the event of excessive pressure buildup in said bellows chamber said bellows member is blown outwardly so that said annular portion is received within said outer groove and caught by surface means defining said outer groove to prevent further outward movement thereof while simultaneously said inner edge is moved away from said support to vent said bellows chamber to atmosphere in a safe manner and relieve the excessive pressure buildup.
 11. A dispenser as set forth in claim 7 in which said inside layer is defined as a layer of aluminum foil, said layer means defining said structural portion is made of paper, and further comprising adhesive means between said inside layer and said layer means holding said inside layer firmly in position.
 12. A dispenser as set forth in claim 7 in which said charging container is defined by a cylindrical tube having a pair of oppositely arranged end plugs. 